<html>
<head><meta charset="utf-8"><title>weekly meeting 2019-10-17 #54818 · t-compiler · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/index.html">t-compiler</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html">weekly meeting 2019-10-17 #54818</a></h3>

<hr>

<base href="https://rust-lang.zulipchat.com">

<head><link href="https://rust-lang.github.io/zulip_archive/style.css" rel="stylesheet"></head>

<a name="178375091"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178375091" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178375091">(Oct 17 2019 at 12:19)</a>:</h4>
<p>Hi <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span> ; the triage meeting will be starting in 1 hour 41 minutes</p>



<a name="178375114"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178375114" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178375114">(Oct 17 2019 at 12:19)</a>:</h4>
<p>I will be doing <a href="#narrow/stream/131828-t-compiler/topic/pre-meeting.20triage.202019-10-17.20.2354818/near/178375102" title="#narrow/stream/131828-t-compiler/topic/pre-meeting.20triage.202019-10-17.20.2354818/near/178375102">pre-triage in a parallel topic</a></p>



<a name="178375178"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178375178" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178375178">(Oct 17 2019 at 12:20)</a>:</h4>
<p>WG-checkins this week are from WG-meta and WG-mir-opt</p>



<a name="178375214"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178375214" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178375214">(Oct 17 2019 at 12:20)</a>:</h4>
<p><span aria-label="question" class="emoji emoji-2753" role="img" title="question">:question:</span> For <span class="user-group-mention" data-user-group-id="1095">@T-compiler/WG-meta</span> : would either <span class="user-mention" data-user-id="116107">@davidtwco</span> or <span class="user-mention" data-user-id="116266">@Santiago Pastorino</span> be willing to present an update?</p>



<a name="178375236"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178375236" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178375236">(Oct 17 2019 at 12:21)</a>:</h4>
<p><span aria-label="question" class="emoji emoji-2753" role="img" title="question">:question:</span> for <span class="user-group-mention" data-user-group-id="1162">@WG-mir-opt</span> : is <span class="user-mention" data-user-id="124288">@oli</span> around? And would they be willing to present an update?</p>



<a name="178375345"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178375345" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178375345">(Oct 17 2019 at 12:22)</a>:</h4>
<p>I am around, I'll prep an update</p>



<a name="178376690"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178376690" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178376690">(Oct 17 2019 at 12:41)</a>:</h4>
<p><span aria-label="question" class="emoji emoji-2753" role="img" title="question">:question:</span> for <span class="user-group-mention" data-user-group-id="492">@T-compiler</span> : do we have a good subteam to whom to delegate issue <a href="https://github.com/rust-lang/rust/issues/65391" target="_blank" title="https://github.com/rust-lang/rust/issues/65391">#65391</a> ("rust-lld since 1.38 overlaps .text with .rodata for embedded arm target")? Who is best to poke at what I presume is a <code>rust-lld</code> bug?</p>



<a name="178377155"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178377155" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178377155">(Oct 17 2019 at 12:46)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> is this specific to arm? if so, I have a contact I can forward it to</p>



<a name="178377166"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178377166" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178377166">(Oct 17 2019 at 12:47)</a>:</h4>
<blockquote>
<p><span class="user-mention silent" data-user-id="116083">pnkfelix</span> is this specific to arm? if so, I have a contact I can forward it to</p>
</blockquote>
<p>not 100% clear if its <em>solely</em> on arm</p>



<a name="178377182"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178377182" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178377182">(Oct 17 2019 at 12:47)</a>:</h4>
<p>but that was where it was observed</p>



<a name="178377196"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178377196" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178377196">(Oct 17 2019 at 12:47)</a>:</h4>
<p>to be honest I don't know where/when we use rust-lld</p>



<a name="178377844"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178377844" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178377844">(Oct 17 2019 at 12:55)</a>:</h4>
<p>ok well I sent an e-mail -- there is someone at Arm who was interested in hearing about things. I'm going to see if I can get them added to Zulip or Github or something.</p>



<a name="178377855"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178377855" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178377855">(Oct 17 2019 at 12:55)</a>:</h4>
<p>Maybe they've got some idea of someone who would know exactly what's going on, who knows.</p>



<a name="178380771"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178380771" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178380771">(Oct 17 2019 at 13:30)</a>:</h4>
<p>I can present an update for meta, when that will happen? at the end of the meeting, right?</p>



<a name="178380782"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178380782" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178380782">(Oct 17 2019 at 13:30)</a>:</h4>
<p><span class="user-mention" data-user-id="116266">@Santiago Pastorino</span> right</p>



<a name="178380789"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178380789" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178380789">(Oct 17 2019 at 13:30)</a>:</h4>
<p><span aria-label="+1" class="emoji emoji-1f44d" role="img" title="+1">:+1:</span></p>



<a name="178380829"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178380829" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178380829">(Oct 17 2019 at 13:31)</a>:</h4>
<p><span aria-label="question" class="emoji emoji-2753" role="img" title="question">:question:</span> for <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span> : as a dev procedure matter, if an issue has been "fixed" by some PR, but someone discovers a variant of the original MCVE that triggers the same bug, should they: (1.) reopen the original issue and post a comment, or (2.) reopen the original issue and add the new example to the description, or (3.) open a fresh issue (and if possible, link to original closed issue, but leave it closed)</p>



<a name="178380839"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178380839" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178380839">(Oct 17 2019 at 13:31)</a>:</h4>
<p>/me eagerly awaits the votes</p>



<a name="178380932"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178380932" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178380932">(Oct 17 2019 at 13:32)</a>:</h4>
<p>Addendum to 3, if they are able to find the original, linking to it is great.</p>



<a name="178380948"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178380948" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178380948">(Oct 17 2019 at 13:32)</a>:</h4>
<p>oh yeah, I'll add that</p>



<a name="178380989"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178380989" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178380989">(Oct 17 2019 at 13:33)</a>:</h4>
<p>the good thing is that its relatively easy to "correct" 1 or 2 by upgrading them to 3</p>



<a name="178381086"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178381086" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178381086">(Oct 17 2019 at 13:34)</a>:</h4>
<p>I think most issue reporters won't know or care about whatever policy we have tho</p>



<a name="178381101"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178381101" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178381101">(Oct 17 2019 at 13:34)</a>:</h4>
<p>(they'll likely do 3.)</p>



<a name="178381144"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178381144" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178381144">(Oct 17 2019 at 13:35)</a>:</h4>
<p>I mostly want to know if I should <strong>avoid</strong> upgrading 1/2 to 3</p>



<a name="178381158"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178381158" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178381158">(Oct 17 2019 at 13:35)</a>:</h4>
<p>but it seems like the votes so far that people will not mind such action</p>



<a name="178381463"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178381463" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178381463">(Oct 17 2019 at 13:38)</a>:</h4>
<p><span aria-label="construction worker" class="emoji emoji-1f477" role="img" title="construction worker">:construction_worker:</span>  <span class="user-mention" data-user-id="116009">@nikomatsakis</span> if ARM folks are looking to help out, we could use a hand on "Segfault compiling libc on armv7-unknown-linux-gnueabihf" <a href="https://github.com/rust-lang/rust/issues/62896" target="_blank" title="https://github.com/rust-lang/rust/issues/62896">#62896</a></p>



<a name="178382289"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178382289" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178382289">(Oct 17 2019 at 13:48)</a>:</h4>
<p><span aria-label="construction worker" class="emoji emoji-1f477" role="img" title="construction worker">:construction_worker:</span> If you are a Windows GNU developer (aka mingw, I think), we could use help looking into this bug: " couldn't load codegen backend on windows-gnu" <a href="https://github.com/rust-lang/rust/issues/61561" target="_blank" title="https://github.com/rust-lang/rust/issues/61561">#61561</a></p>



<a name="178383820"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178383820" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178383820">(Oct 17 2019 at 14:04)</a>:</h4>
<p>Hi <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span></p>



<a name="178383834"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178383834" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178383834">(Oct 17 2019 at 14:04)</a>:</h4>
<p>we're starting now. We'll dedicate five minutes to announcements</p>



<a name="178383885"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178383885" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178383885">(Oct 17 2019 at 14:05)</a>:</h4>
<p><span aria-label="exclamation" class="emoji emoji-2757" role="img" title="exclamation">:exclamation:</span> we have a <a href="https://github.com/rust-lang/compiler-team/issues/186" target="_blank" title="https://github.com/rust-lang/compiler-team/issues/186">design meeting tomorrow</a> about our debuginfo strategy</p>



<a name="178383928"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178383928" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178383928">(Oct 17 2019 at 14:05)</a>:</h4>
<ul>
<li>We had a traits team design meeting yesterday, <a href="https://github.com/rust-lang/wg-traits/tree/master/minutes" target="_blank" title="https://github.com/rust-lang/wg-traits/tree/master/minutes">minutes available here</a>, going over some thoughts on lazy normalization and sketching out thoughts about what a generic library for types might look like</li>
</ul>



<a name="178384015"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384015" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384015">(Oct 17 2019 at 14:06)</a>:</h4>
<ul>
<li>I've also been looking more into "lazy norm for constants" and hope to write up some notes -- that may well be the topic of the next "wg-traits design meeting", which will I think be monday (we're moving from wednesdays to mondays because scheduling -- see the compiler team calendar)</li>
</ul>



<a name="178384081"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384081" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384081">(Oct 17 2019 at 14:07)</a>:</h4>
<ul>
<li>Oh and we're <em>about</em> to pull the trigger on the LLVM ICE-breakers thing, I think the only thing we're waiting for is maybe some updates to the triagebot, though it's not clear if we should block on that (the desired feature is one to automate the "tag and ping members" step; otherwise we just have to write up some manual instructions for what to do)</li>
</ul>



<a name="178384162"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384162" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384162">(Oct 17 2019 at 14:08)</a>:</h4>
<p><span class="user-mention" data-user-id="116009">@nikomatsakis</span>  n.b. tho that lazy normalization for constants interacts with provided defaults (associated_type_defaults) so we need to ensure that the RFCs rules apply before allowing more code</p>



<a name="178384198"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384198" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384198">(Oct 17 2019 at 14:08)</a>:</h4>
<p>hmm, interesting ok :) -- let's discuss offline</p>



<a name="178384222"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384222" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384222">(Oct 17 2019 at 14:08)</a>:</h4>
<ul>
<li>And <span class="user-mention" data-user-id="125250">@Wesley Wiser</span> <a href="https://blog.rust-lang.org/inside-rust/2019/10/15/compiler-team-meeting.html" target="_blank" title="https://blog.rust-lang.org/inside-rust/2019/10/15/compiler-team-meeting.html">posted the minutes from last week's triage meeting</a> on the Inside Rust blog :)</li>
</ul>



<a name="178384242"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384242" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384242">(Oct 17 2019 at 14:09)</a>:</h4>
<ul>
<li>I've done most of the work for interning place projections, first PR <a href="https://github.com/rust-lang/rust/pull/65197" target="_blank" title="https://github.com/rust-lang/rust/pull/65197">https://github.com/rust-lang/rust/pull/65197</a> which is about visiting projections avoiding mutation and the other part is the actual interning part <a href="https://github.com/rust-lang/rust/pull/65315" target="_blank" title="https://github.com/rust-lang/rust/pull/65315">https://github.com/rust-lang/rust/pull/65315</a>.  Benchs on max=rss <a href="https://perf.rust-lang.org/compare.html?start=0e8a4b441c5da21a2cb19448728ade5baa299c66&amp;end=2c213ec3e5720569c0f2ad71bc1cf48a7c3077b5&amp;stat=max-rss" target="_blank" title="https://perf.rust-lang.org/compare.html?start=0e8a4b441c5da21a2cb19448728ade5baa299c66&amp;end=2c213ec3e5720569c0f2ad71bc1cf48a7c3077b5&amp;stat=max-rss">https://perf.rust-lang.org/compare.html?start=0e8a4b441c5da21a2cb19448728ade5baa299c66&amp;end=2c213ec3e5720569c0f2ad71bc1cf48a7c3077b5&amp;stat=max-rss</a> looks nice.</li>
</ul>



<a name="178384304"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384304" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384304">(Oct 17 2019 at 14:09)</a>:</h4>
<p>Update re. libsyntax: I'm working on it (<a href="https://github.com/rust-lang/rust/pull/65324" target="_blank" title="https://github.com/rust-lang/rust/pull/65324">https://github.com/rust-lang/rust/pull/65324</a>) slowly but surely</p>



<a name="178384311"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384311" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384311">(Oct 17 2019 at 14:09)</a>:</h4>
<p>regarding ICE-breakers</p>



<a name="178384338"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384338" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384338">(Oct 17 2019 at 14:09)</a>:</h4>
<p>do I need to worry about my choice of P-high/P-medium prioirty assignments?</p>



<a name="178384413"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384413" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384413">(Oct 17 2019 at 14:10)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> I don't think so, but we should discuss how to use it as part of pre-triage etc</p>



<a name="178384418"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384418" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384418">(Oct 17 2019 at 14:10)</a>:</h4>
<p>i.e. is that going to somehow screw things up if I downgrade an ICE from P-high to P-medium because I'm tired of looking at it each week?</p>



<a name="178384429"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384429" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384429">(Oct 17 2019 at 14:10)</a>:</h4>
<blockquote>
<ul>
<li>I've done most of the work for interning place projections, first PR <a href="https://github.com/rust-lang/rust/pull/65197" target="_blank" title="https://github.com/rust-lang/rust/pull/65197">https://github.com/rust-lang/rust/pull/65197</a> which is about visiting projections avoiding mutation and the other part is the actual interning part <a href="https://github.com/rust-lang/rust/pull/65315" target="_blank" title="https://github.com/rust-lang/rust/pull/65315">https://github.com/rust-lang/rust/pull/65315</a>.  Benchs on max=rss <a href="https://perf.rust-lang.org/compare.html?start=0e8a4b441c5da21a2cb19448728ade5baa299c66&amp;end=2c213ec3e5720569c0f2ad71bc1cf48a7c3077b5&amp;stat=max-rss" target="_blank" title="https://perf.rust-lang.org/compare.html?start=0e8a4b441c5da21a2cb19448728ade5baa299c66&amp;end=2c213ec3e5720569c0f2ad71bc1cf48a7c3077b5&amp;stat=max-rss">https://perf.rust-lang.org/compare.html?start=0e8a4b441c5da21a2cb19448728ade5baa299c66&amp;end=2c213ec3e5720569c0f2ad71bc1cf48a7c3077b5&amp;stat=max-rss</a> looks nice.</li>
</ul>
</blockquote>
<p>first PR there's a weird macro that's under discussion and in the other PR I'd need to make some refactors before merging because there's a lot of code duplication</p>



<a name="178384459"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384459" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384459">(Oct 17 2019 at 14:10)</a>:</h4>
<p>oh, no, in fact, this is specifically <em>meant</em> for things that are not p-high, <span class="user-mention" data-user-id="116083">@pnkfelix</span> -- basically more a way to "call attention" to bugs</p>



<a name="178384570"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384570" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384570">(Oct 17 2019 at 14:11)</a>:</h4>
<p>oh I always keep forgetting that "ICE breakers" is not necessarily about "Internal Compiler Error" bugs (but it can be)</p>



<a name="178384618"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384618" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384618">(Oct 17 2019 at 14:12)</a>:</h4>
<p>this pun is going to kill me</p>



<a name="178384627"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384627" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384627">(Oct 17 2019 at 14:12)</a>:</h4>
<p><a href="https://github.com/rust-lang/blog.rust-lang.org/pull/417" target="_blank" title="https://github.com/rust-lang/blog.rust-lang.org/pull/417">Draft blog post announcing LLVM ICE-breakers</a></p>



<a name="178384640"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384640" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384640">(Oct 17 2019 at 14:12)</a>:</h4>
<p>Yeah maybe the name is ultimately unwise for that reason :)</p>



<a name="178384644"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384644" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384644">(Oct 17 2019 at 14:12)</a>:</h4>
<p>but I can't think of a better one</p>



<a name="178384704"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384704" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384704">(Oct 17 2019 at 14:13)</a>:</h4>
<p>wait... ICE-breakers is not about breaking ICEs?</p>



<a name="178384710"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384710" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384710">(Oct 17 2019 at 14:13)</a>:</h4>
<p>/me ponders puns on "blind date"</p>



<a name="178384715"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384715" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384715">(Oct 17 2019 at 14:13)</a>:</h4>
<p>confusing...</p>



<a name="178384725"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384725" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384725">(Oct 17 2019 at 14:13)</a>:</h4>
<p>not <em>just</em> about that</p>



<a name="178384774"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384774" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384774">(Oct 17 2019 at 14:13)</a>:</h4>
<p>From the post: "In fact, very few LLVM bugs cause real ICEs, but the name was too good to pass up."</p>



<a name="178384849"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384849" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384849">(Oct 17 2019 at 14:14)</a>:</h4>
<p>ain’t every llvm assertion an ICE?</p>



<a name="178384864"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384864" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384864">(Oct 17 2019 at 14:14)</a>:</h4>
<p>not if we have them turned off</p>



<a name="178384890"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384890" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384890">(Oct 17 2019 at 14:14)</a>:</h4>
<p>not sure why we coupled LLVM with ICEs...</p>



<a name="178384896"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384896" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384896">(Oct 17 2019 at 14:14)</a>:</h4>
<p>touche</p>



<a name="178384898"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384898" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384898">(Oct 17 2019 at 14:14)</a>:</h4>
<p>eeeeh, I could say that a sigsegv is still an ICE <span aria-label="slight smile" class="emoji emoji-1f642" role="img" title="slight smile">:slight_smile:</span></p>



<a name="178384904"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384904" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384904">(Oct 17 2019 at 14:14)</a>:</h4>
<p>but shall we start?</p>



<a name="178384955"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384955" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384955">(Oct 17 2019 at 14:15)</a>:</h4>
<p>yeah okay so that's ten minutes of announcements. Feel free to privmsg me if you want me to allocate time at the end for anything people forgot</p>



<a name="178384977"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384977" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384977">(Oct 17 2019 at 14:15)</a>:</h4>
<p>So, lets see</p>



<a name="178384993"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178384993" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178384993">(Oct 17 2019 at 14:15)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=label%3Abeta-nominated+label%3AT-compiler" target="_blank" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=label%3Abeta-nominated+label%3AT-compiler">beta-noms</a></p>



<a name="178385049"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385049" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385049">(Oct 17 2019 at 14:16)</a>:</h4>
<p>there are two</p>



<a name="178385066"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385066" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385066">(Oct 17 2019 at 14:16)</a>:</h4>
<p>beta-nom 1/2: "Add troubleshooting section to PGO chapter in rustc book." <a href="https://github.com/rust-lang/rust/issues/65402" target="_blank" title="https://github.com/rust-lang/rust/issues/65402">#65402</a></p>



<a name="178385083"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385083" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385083">(Oct 17 2019 at 14:16)</a>:</h4>
<p>...why ...</p>



<a name="178385091"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385091" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385091">(Oct 17 2019 at 14:16)</a>:</h4>
<p>why would we back port an entry in the rustc book ?</p>



<a name="178385108"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385108" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385108">(Oct 17 2019 at 14:17)</a>:</h4>
<p>oh wait</p>



<a name="178385121"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385121" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385121">(Oct 17 2019 at 14:17)</a>:</h4>
<p>I'm confusing rustc book with rustc guide, aren't i</p>



<a name="178385139"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385139" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385139">(Oct 17 2019 at 14:17)</a>:</h4>
<p>this is targetted at rustc <em>users</em> right? Not rustc developers?</p>



<a name="178385150"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385150" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385150">(Oct 17 2019 at 14:17)</a>:</h4>
<p>(perhaps we should rename rustc-guide)</p>



<a name="178385158"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385158" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385158">(Oct 17 2019 at 14:17)</a>:</h4>
<p>rustc deveopers guide, something like that</p>



<a name="178385171"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385171" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385171">(Oct 17 2019 at 14:17)</a>:</h4>
<p>okay well</p>



<a name="178385218"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385218" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385218">(Oct 17 2019 at 14:18)</a>:</h4>
<p>sorry i forgot to add the vote emojis</p>



<a name="178385255"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385255" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385255">(Oct 17 2019 at 14:18)</a>:</h4>
<p>I guess it seems there is like zero harm in doing this</p>



<a name="178385287"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385287" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385287">(Oct 17 2019 at 14:19)</a>:</h4>
<p>accepted?</p>



<a name="178385302"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385302" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385302">(Oct 17 2019 at 14:19)</a>:</h4>
<p>and <span class="user-mention" data-user-id="124287">@mw</span> said they were nominating for backport when they posted, so <span class="user-mention" data-user-id="116015">@Alex Crichton</span> was aware of that intent</p>



<a name="178385306"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385306" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385306">(Oct 17 2019 at 14:19)</a>:</h4>
<p>so yeah, I guess beta-accepted</p>



<a name="178385317"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385317" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385317">(Oct 17 2019 at 14:19)</a>:</h4>
<p>just ... weird ...</p>



<a name="178385329"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385329" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385329">(Oct 17 2019 at 14:19)</a>:</h4>
<p>( opened an issue "rename to rustc-dev-guide" <a href="https://github.com/rust-lang/rustc-guide/issues/470" target="_blank" title="https://github.com/rust-lang/rustc-guide/issues/470">rustc-guide#470</a> )</p>



<a name="178385401"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385401" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385401">(Oct 17 2019 at 14:20)</a>:</h4>
<p>aww, that will invalidate my Firefox history :D</p>



<a name="178385413"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385413" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385413">(Oct 17 2019 at 14:20)</a>:</h4>
<p>beta-nom 2/2: "Optimize <code>try_expand_impl_trait_type</code>" <a href="https://github.com/rust-lang/rust/issues/65293" target="_blank" title="https://github.com/rust-lang/rust/issues/65293">#65293</a></p>



<a name="178385486"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385486" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385486">(Oct 17 2019 at 14:21)</a>:</h4>
<p>why is this beta nominated?</p>



<a name="178385511"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385511" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385511">(Oct 17 2019 at 14:21)</a>:</h4>
<p>because of async, I infer</p>



<a name="178385512"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385512" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385512">(Oct 17 2019 at 14:21)</a>:</h4>
<p>ah there's a regression</p>



<a name="178385531"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385531" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385531">(Oct 17 2019 at 14:21)</a>:</h4>
<p>well, a quasi-regression</p>



<a name="178385543"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385543" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385543">(Oct 17 2019 at 14:21)</a>:</h4>
<p>since async wasn't usable</p>



<a name="178385597"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385597" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385597">(Oct 17 2019 at 14:22)</a>:</h4>
<p>I could go either way on this, but I think it's low risk, and it can be a massive compilation time win</p>



<a name="178385622"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385622" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385622">(Oct 17 2019 at 14:22)</a>:</h4>
<p>I also nominated <a href="https://github.com/rust-lang/rust/pull/65172" target="_blank" title="https://github.com/rust-lang/rust/pull/65172">https://github.com/rust-lang/rust/pull/65172</a> just now for a similar reason.</p>



<a name="178385635"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385635" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385635">(Oct 17 2019 at 14:22)</a>:</h4>
<p>does the optimization in question only end up applying to Async types?</p>



<a name="178385646"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385646" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385646">(Oct 17 2019 at 14:22)</a>:</h4>
<p>or does it just happen to correlate with types that tend to be generated as part of async code?</p>



<a name="178385647"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385647" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385647">(Oct 17 2019 at 14:22)</a>:</h4>
<p>hmm actualy no</p>



<a name="178385651"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385651" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385651">(Oct 17 2019 at 14:22)</a>:</h4>
<p>good point</p>



<a name="178385658"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385658" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385658">(Oct 17 2019 at 14:23)</a>:</h4>
<p>I think it applies to any impl trait type</p>



<a name="178385745"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385745" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385745">(Oct 17 2019 at 14:23)</a>:</h4>
<p>I don't know if that makes me more or less inclined to backport</p>



<a name="178385825"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385825" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385825">(Oct 17 2019 at 14:24)</a>:</h4>
<p>but I guess no one is objecting</p>



<a name="178385838"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385838" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385838">(Oct 17 2019 at 14:24)</a>:</h4>
<p>so okay, accepted for backport</p>



<a name="178385848"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385848" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385848">(Oct 17 2019 at 14:24)</a>:</h4>
<p>I guess I wonder if we are sure-sure it is safe?</p>



<a name="178385923"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385923" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385923">(Oct 17 2019 at 14:25)</a>:</h4>
<blockquote>
<p>I guess I wonder if we are sure-sure it is safe?</p>
</blockquote>
<p>is that like "the true-true" ?</p>



<a name="178385949"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385949" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385949">(Oct 17 2019 at 14:25)</a>:</h4>
<p>it's extra sure <span aria-label="slight smile" class="emoji emoji-1f642" role="img" title="slight smile">:slight_smile:</span></p>



<a name="178385969"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178385969" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178385969">(Oct 17 2019 at 14:25)</a>:</h4>
<p>iirc, we are searching through the type tree, and this just avoids re-searching the same types over and over</p>



<a name="178386060"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386060" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386060">(Oct 17 2019 at 14:26)</a>:</h4>
<p>ok let's <span aria-label="back" class="emoji emoji-1f519" role="img" title="back">:back:</span> then</p>



<a name="178386073"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386073" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386073">(Oct 17 2019 at 14:26)</a>:</h4>
<p>sure, okay</p>



<a name="178386123"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386123" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386123">(Oct 17 2019 at 14:26)</a>:</h4>
<p>beta-nom 3/2 ( <span aria-label="wink" class="emoji emoji-1f609" role="img" title="wink">:wink:</span> <span class="user-mention" data-user-id="123586">@nagisa</span> ): " use precalculated dominators in explain_borrow" <a href="https://github.com/rust-lang/rust/issues/65172" target="_blank" title="https://github.com/rust-lang/rust/issues/65172">#65172</a></p>



<a name="178386154"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386154" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386154">(Oct 17 2019 at 14:27)</a>:</h4>
<p>I nominated this because this is similar to before in that without this PR we spend hours… doing stuff</p>



<a name="178386166"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386166" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386166">(Oct 17 2019 at 14:27)</a>:</h4>
<p>in this case generating borrow errors.</p>



<a name="178386175"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386175" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386175">(Oct 17 2019 at 14:27)</a>:</h4>
<p>oh my</p>



<a name="178386190"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386190" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386190">(Oct 17 2019 at 14:27)</a>:</h4>
<p>talk about small diffs</p>



<a name="178386212"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386212" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386212">(Oct 17 2019 at 14:27)</a>:</h4>
<p>lol</p>



<a name="178386309"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386309" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386309">(Oct 17 2019 at 14:28)</a>:</h4>
<p>okay sure accepted for beta backport</p>



<a name="178386413"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386413" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386413">(Oct 17 2019 at 14:29)</a>:</h4>
<p>next up</p>



<a name="178386418"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386418" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386418">(Oct 17 2019 at 14:29)</a>:</h4>
<p>stable-noms</p>



<a name="178386426"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386426" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386426">(Oct 17 2019 at 14:29)</a>:</h4>
<p>zero stable-noms!</p>



<a name="178386551"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386551" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386551">(Oct 17 2019 at 14:30)</a>:</h4>
<p>We won't go over the list of stable-to-beta and stable-to-nightly regressions here</p>



<a name="178386572"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386572" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386572">(Oct 17 2019 at 14:30)</a>:</h4>
<p>(you can see what I got through during pre-triage in that topic)</p>



<a name="178386593"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386593" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386593">(Oct 17 2019 at 14:31)</a>:</h4>
<p>there are <a href="https://github.com/rust-lang/rust/pulls?q=is%3Aopen+is%3Apr+label%3AS-waiting-on-team+label%3AT-compiler" target="_blank" title="https://github.com/rust-lang/rust/pulls?q=is%3Aopen+is%3Apr+label%3AS-waiting-on-team+label%3AT-compiler">three PR's</a> marked S-waiting-on-team for us</p>



<a name="178386620"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386620" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386620">(Oct 17 2019 at 14:31)</a>:</h4>
<p>hopefuly this will be quick</p>



<a name="178386629"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386629" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386629">(Oct 17 2019 at 14:32)</a>:</h4>
<p>waiting-on-team aka WOT: "Remove rust optimize" <a href="https://github.com/rust-lang/rust/issues/65408" target="_blank" title="https://github.com/rust-lang/rust/issues/65408">#65408</a></p>



<a name="178386673"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386673" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386673">(Oct 17 2019 at 14:32)</a>:</h4>
<p>I nominated this.</p>



<a name="178386697"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386697" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386697">(Oct 17 2019 at 14:32)</a>:</h4>
<p>the basic question is this: The rustc config.toml has a <code>optimize = true</code> default setting</p>



<a name="178386706"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386706" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386706">(Oct 17 2019 at 14:32)</a>:</h4>
<p>but on some targets, if you set it to false, the build fails</p>



<a name="178386710"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386710" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386710">(Oct 17 2019 at 14:32)</a>:</h4>
<p>(<a href="https://github.com/rust-lang/rust/issues/65352" target="_blank" title="https://github.com/rust-lang/rust/issues/65352">#65352</a>)</p>



<a name="178386748"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386748" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386748">(Oct 17 2019 at 14:33)</a>:</h4>
<p>so the PR author suggested "why don't we just remove this option's documentation from the config.toml</p>



<a name="178386749"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386749" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386749">(Oct 17 2019 at 14:33)</a>:</h4>
<p>I’m not against, it is infesible to build rustc without optimisations enabled for more reasons than that it just fails.</p>



<a name="178386802"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386802" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386802">(Oct 17 2019 at 14:33)</a>:</h4>
<p>You can see on the comments on <a href="https://github.com/rust-lang/rust/issues/65408" target="_blank" title="https://github.com/rust-lang/rust/issues/65408">#65408</a> that I'm torn about this</p>



<a name="178386806"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386806" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386806">(Oct 17 2019 at 14:33)</a>:</h4>
<p>wait</p>



<a name="178386883"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386883" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386883">(Oct 17 2019 at 14:34)</a>:</h4>
<p>huh, I'm surprised anyone would consider this :)</p>



<a name="178386926"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386926" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386926">(Oct 17 2019 at 14:34)</a>:</h4>
<p>the main reason I'm torn is: If you just remove this documentation, then are people going to be surprised that setting <code>debug = true</code> does <em>not</em> disable optimizations?</p>



<a name="178386928"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386928" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386928">(Oct 17 2019 at 14:34)</a>:</h4>
<p>though it's true I never set the flag to false :)</p>



<a name="178386956"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386956" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386956">(Oct 17 2019 at 14:35)</a>:</h4>
<p>anyway i'll repost in the form of a vote</p>



<a name="178386968"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386968" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386968">(Oct 17 2019 at 14:35)</a>:</h4>
<p>WOT: "Remove rust optimize" <a href="https://github.com/rust-lang/rust/issues/65408" target="_blank" title="https://github.com/rust-lang/rust/issues/65408">#65408</a></p>



<a name="178386970"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386970" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386970">(Oct 17 2019 at 14:35)</a>:</h4>
<p>I guess I do feel these are all advanced options and we should just say like "it is strongly recommended to set this to true; on some architectures we can' build without it"</p>



<a name="178386977"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178386977" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178386977">(Oct 17 2019 at 14:35)</a>:</h4>
<p>but I can leave a comment</p>



<a name="178387004"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387004" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387004">(Oct 17 2019 at 14:35)</a>:</h4>
<p>Seems like dead code in practice? I'm in favor of removing dead code ^^</p>



<a name="178387077"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387077" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387077">(Oct 17 2019 at 14:36)</a>:</h4>
<p>I <em>used</em> to set it to false on occasion</p>



<a name="178387080"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387080" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387080">(Oct 17 2019 at 14:36)</a>:</h4>
<p>but its been years</p>



<a name="178387092"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387092" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387092">(Oct 17 2019 at 14:36)</a>:</h4>
<p>In my experience people who set this option to false do so by mistake (and then spend waiting days for rustc to bootstrap)</p>



<a name="178387110"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387110" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387110">(Oct 17 2019 at 14:36)</a>:</h4>
<p>There have been a couple of cases of this happening.</p>



<a name="178387113"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387113" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387113">(Oct 17 2019 at 14:36)</a>:</h4>
<p><span class="user-mention" data-user-id="123586">@nagisa</span> has that happened recently? Even with the big warning sign we added?</p>



<a name="178387135"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387135" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387135">(Oct 17 2019 at 14:36)</a>:</h4>
<p>Not recently no, last instance I remember was &gt; year ago.</p>



<a name="178387138"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387138" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387138">(Oct 17 2019 at 14:37)</a>:</h4>
<p>okay</p>



<a name="178387157"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387157" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387157">(Oct 17 2019 at 14:37)</a>:</h4>
<p>anyway, maybe lets let people put any further thoughts onto the PR itself as comments</p>



<a name="178387182"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387182" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387182">(Oct 17 2019 at 14:37)</a>:</h4>
<p>(I won't veto it landing)</p>



<a name="178387207"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387207" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387207">(Oct 17 2019 at 14:37)</a>:</h4>
<p>(but I might be more inclined to take an approach like what <span class="user-mention" data-user-id="116009">@nikomatsakis</span> suggests...)</p>



<a name="178387266"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387266" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387266">(Oct 17 2019 at 14:38)</a>:</h4>
<p>WOT: "Mention keyword closing policy" <a href="https://github.com/rust-lang/rust/issues/65007" target="_blank" title="https://github.com/rust-lang/rust/issues/65007">#65007</a></p>



<a name="178387317"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387317" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387317">(Oct 17 2019 at 14:38)</a>:</h4>
<p>oh I didn't know we weren't suppose to put those into commit messages</p>



<a name="178387322"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387322" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387322">(Oct 17 2019 at 14:38)</a>:</h4>
<p>I think it's sometimes useful to mention issues in commits</p>



<a name="178387336"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387336" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387336">(Oct 17 2019 at 14:38)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> I don't think that has been established yet <span aria-label="slight smile" class="emoji emoji-1f642" role="img" title="slight smile">:slight_smile:</span></p>



<a name="178387379"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387379" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387379">(Oct 17 2019 at 14:39)</a>:</h4>
<p>for example, while working on a PR I might note an issue number in the commit message so that I remember it</p>



<a name="178387389"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387389" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387389">(Oct 17 2019 at 14:39)</a>:</h4>
<p>There is a difference between linking an issue and writing "fix #NNN"</p>



<a name="178387395"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387395" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387395">(Oct 17 2019 at 14:39)</a>:</h4>
<p>also note that rollups do these automatically</p>



<a name="178387404"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387404" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387404">(Oct 17 2019 at 14:39)</a>:</h4>
<p>the text that I see only says, I think, to avoid the latter?</p>



<a name="178387483"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387483" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387483">(Oct 17 2019 at 14:40)</a>:</h4>
<p>anyway if we actually want to enforce if, we probably should do so with tidy or something, no?</p>



<a name="178387489"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387489" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387489">(Oct 17 2019 at 14:40)</a>:</h4>
<p>it seems the purpose of the proposal is to "keep things tidy"</p>



<a name="178387501"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387501" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387501">(Oct 17 2019 at 14:40)</a>:</h4>
<p>seems silly to make it a policy that few of the devs would be aware of ...</p>



<a name="178387507"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387507" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387507">(Oct 17 2019 at 14:40)</a>:</h4>
<p>and then closing keywords or just mentions won't make a difference (also see: rollups do this automatically...)</p>



<a name="178387519"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387519" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387519">(Oct 17 2019 at 14:40)</a>:</h4>
<p>agree; I think we shouldn't legislate here</p>



<a name="178387532"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387532" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387532">(Oct 17 2019 at 14:41)</a>:</h4>
<p>I'm of two minds. The main advantage I see to having things in the PR is that I often find myself editing the PR heading to remove "Fixes <a href="https://github.com/rust-lang/rust/issues/123" target="_blank" title="https://github.com/rust-lang/rust/issues/123">#123</a>" or whatever (or to add it!), depending on whether I think the PR truly fixes the <em>entire</em> issue</p>



<a name="178387548"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387548" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387548">(Oct 17 2019 at 14:41)</a>:</h4>
<p>But mostly I don't care and don't think it matters that much what we say here :)</p>



<a name="178387568"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387568" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387568">(Oct 17 2019 at 14:41)</a>:</h4>
<p>also, isn't it weird that this PR says it fixes <a href="https://github.com/rust-lang/rust/issues/59233" target="_blank" title="https://github.com/rust-lang/rust/issues/59233">#59233</a></p>



<a name="178387578"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387578" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387578">(Oct 17 2019 at 14:41)</a>:</h4>
<p>( Also, putting <a href="https://github.com/rust-lang/rust/issues/123" target="_blank" title="https://github.com/rust-lang/rust/issues/123">#123</a> in commit messages <em>can</em> lead to a lot of "comment spam" on issues sometimes, where the commit is cited again and again. )</p>



<a name="178387586"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387586" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387586">(Oct 17 2019 at 14:41)</a>:</h4>
<p>when that issue is about avoiding <em>merge commits</em></p>



<a name="178387596"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387596" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387596">(Oct 17 2019 at 14:41)</a>:</h4>
<p>and yet the text here makes no mention of merge commits ?</p>



<a name="178387657"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387657" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387657">(Oct 17 2019 at 14:42)</a>:</h4>
<p><span class="user-mention" data-user-id="116009">@nikomatsakis</span> that mostly comes from rollups tho</p>



<a name="178387658"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387658" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387658">(Oct 17 2019 at 14:42)</a>:</h4>
<p>oh I see, it was going to be closed, but then someone asked to keep it open due to this closing-keyword issue</p>



<a name="178387671"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387671" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387671">(Oct 17 2019 at 14:42)</a>:</h4>
<p>precisely example of the phenomenon I am talking about, perhaps :)</p>



<a name="178387728"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387728" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387728">(Oct 17 2019 at 14:43)</a>:</h4>
<p>The only thing I wish people did not put into commit messages are <code>r? @mention</code>.</p>



<a name="178387732"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387732" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387732">(Oct 17 2019 at 14:43)</a>:</h4>
<p>I see the original reasoning is referring to what I am talking about:</p>
<blockquote>
<p>I think we should encourage contributors close issues by keywords in PR descriptions only.<br>
Because otherwise the commit could be rebased many times, and each time it creates a reference to<br>
the want-to-close issue. </p>
</blockquote>



<a name="178387753"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387753" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387753">(Oct 17 2019 at 14:43)</a>:</h4>
<blockquote>
<p>The only thing I wish people did not put into commit messages are <code>r? @mention</code>.</p>
</blockquote>
<p>seems like thats an even more important policy to establish</p>



<a name="178387775"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387775" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387775">(Oct 17 2019 at 14:43)</a>:</h4>
<p>well.. bors does that because it copies the main post of a PR</p>



<a name="178387786"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387786" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387786">(Oct 17 2019 at 14:43)</a>:</h4>
<p>(Re. rollups: If you write <code>Fixes #12345</code> in the PR description it generates a ping because it translates into the commit message.)</p>



<a name="178387842"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387842" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387842">(Oct 17 2019 at 14:44)</a>:</h4>
<p>Yeah, and I don't think that should change</p>



<a name="178387860"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387860" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387860">(Oct 17 2019 at 14:44)</a>:</h4>
<p>Nonetheless I think the point here is about policy for human-written messages, not the rollup-generated nor bors-generated ones</p>



<a name="178387865"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387865" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387865">(Oct 17 2019 at 14:44)</a>:</h4>
<p>it's useful to have links in that commit message</p>



<a name="178387884"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387884" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387884">(Oct 17 2019 at 14:44)</a>:</h4>
<p>the rollup and bors generated messages represent the final state of the PR description at merge time, right?</p>



<a name="178387900"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387900" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387900">(Oct 17 2019 at 14:44)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> assuming it lands <span aria-label="slight smile" class="emoji emoji-1f642" role="img" title="slight smile">:slight_smile:</span></p>



<a name="178387902"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387902" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387902">(Oct 17 2019 at 14:44)</a>:</h4>
<p>while human written commit messages are often outdated w.r.t. their actual real effects on the issues DB</p>



<a name="178387906"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387906" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387906">(Oct 17 2019 at 14:45)</a>:</h4>
<p>(which often does not happen)</p>



<a name="178387942"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387942" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387942">(Oct 17 2019 at 14:45)</a>:</h4>
<p>My point is that I think it is reasonable to say that we want a policy like this for the human authored messages</p>



<a name="178387973"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387973" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387973">(Oct 17 2019 at 14:45)</a>:</h4>
<p>I feel like we're spending a lot of time for text next to nobody reads:)</p>



<a name="178387990"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178387990" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178387990">(Oct 17 2019 at 14:45)</a>:</h4>
<p>the bors and rollups can follow a different policy that does not have to be a superset of the rules</p>



<a name="178388058"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388058" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388058">(Oct 17 2019 at 14:46)</a>:</h4>
<p>/me used to be famous for their commit messages that no one would read</p>



<a name="178388060"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388060" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388060">(Oct 17 2019 at 14:46)</a>:</h4>
<p>What is the policy exactly? no "Fixed <a href="https://github.com/rust-lang/rust/issues/1234" target="_blank" title="https://github.com/rust-lang/rust/issues/1234">#1234</a>" but "Some random thing about <a href="https://github.com/rust-lang/rust/issues/1234" target="_blank" title="https://github.com/rust-lang/rust/issues/1234">#1234</a>" is fine?</p>



<a name="178388088"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388088" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388088">(Oct 17 2019 at 14:46)</a>:</h4>
<p>I think the point <span class="user-mention" data-user-id="116009">@nikomatsakis</span> was making above was that even "random thing about <a href="https://github.com/rust-lang/rust/issues/1234" target="_blank" title="https://github.com/rust-lang/rust/issues/1234">#1234</a>" is not good</p>



<a name="178388089"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388089" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388089">(Oct 17 2019 at 14:46)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> fwiw, I've find your messages from the past useful!</p>



<a name="178388116"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388116" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388116">(Oct 17 2019 at 14:47)</a>:</h4>
<p>okay well</p>



<a name="178388136"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388136" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388136">(Oct 17 2019 at 14:47)</a>:</h4>
<p>it seems like we should maybe discuss this on ticket?</p>



<a name="178388169"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388169" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388169">(Oct 17 2019 at 14:47)</a>:</h4>
<p>we can skip the Zoxc PR marked waiting-on-team</p>



<a name="178388173"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388173" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388173">(Oct 17 2019 at 14:47)</a>:</h4>
<p>fair</p>



<a name="178388248"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388248" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388248">(Oct 17 2019 at 14:48)</a>:</h4>
<p>for the nominated issues</p>



<a name="178388252"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388252" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388252">(Oct 17 2019 at 14:48)</a>:</h4>
<p>we have 4</p>



<a name="178388283"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388283" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388283">(Oct 17 2019 at 14:48)</a>:</h4>
<p>and I'm skipping the first one filed an hour ago</p>



<a name="178388301"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388301" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388301">(Oct 17 2019 at 14:48)</a>:</h4>
<p>nom: "Deferred ICEs (i.e. delay_span_bug) are not preserved by incremental." <a href="https://github.com/rust-lang/rust/issues/65401" target="_blank" title="https://github.com/rust-lang/rust/issues/65401">#65401</a></p>



<a name="178388324"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388324" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388324">(Oct 17 2019 at 14:49)</a>:</h4>
<p>I think <span class="user-mention" data-user-id="126931">@centril</span> nominated this for prioiritzation</p>



<a name="178388333"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388333" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388333">(Oct 17 2019 at 14:49)</a>:</h4>
<p>I left it nominated though</p>



<a name="178388339"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388339" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388339">(Oct 17 2019 at 14:49)</a>:</h4>
<p>because the associated PR</p>



<a name="178388344"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388344" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388344">(Oct 17 2019 at 14:49)</a>:</h4>
<p>has an interesting problem</p>



<a name="178388360"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388360" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388360">(Oct 17 2019 at 14:49)</a>:</h4>
<p>PR <a href="https://github.com/rust-lang/rust/issues/65470" target="_blank" title="https://github.com/rust-lang/rust/issues/65470">#65470</a></p>



<a name="178388367"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388367" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388367">(Oct 17 2019 at 14:49)</a>:</h4>
<p>wants to know</p>



<a name="178388381"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388381" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388381">(Oct 17 2019 at 14:49)</a>:</h4>
<p>"how do I write a regression test for this?"</p>



<a name="178388408"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388408" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388408">(Oct 17 2019 at 14:49)</a>:</h4>
<p>I assumed <span class="user-mention" data-user-id="124287">@mw</span> would follow up on that</p>



<a name="178388411"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388411" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388411">(Oct 17 2019 at 14:49)</a>:</h4>
<p>we don't expose anything analogous to #[rustc_error]</p>



<a name="178388473"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388473" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388473">(Oct 17 2019 at 14:50)</a>:</h4>
<p>for generating an ICE or delay_span_bug in a controlled manner</p>



<a name="178388509"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388509" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388509">(Oct 17 2019 at 14:50)</a>:</h4>
<p>any opinions or objections to suggesting that approach (solely for test authoring) ?</p>



<a name="178388514"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388514" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388514">(Oct 17 2019 at 14:50)</a>:</h4>
<p>or is that overkill?</p>



<a name="178388541"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388541" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388541">(Oct 17 2019 at 14:51)</a>:</h4>
<p>we have <code>-Ztreat-err-as-bug</code></p>



<a name="178388547"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388547" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388547">(Oct 17 2019 at 14:51)</a>:</h4>
<p>(the only other approaches I can imagine are either 2. have no tests at all, or 3. use some pre-exisiting ICE and then update it each time the compiler gets fixed)</p>



<a name="178388551"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388551" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388551">(Oct 17 2019 at 14:51)</a>:</h4>
<p>ooooh</p>



<a name="178388555"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388555" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388555">(Oct 17 2019 at 14:51)</a>:</h4>
<p>we even have tests for the ICE it produces</p>



<a name="178388569"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388569" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388569">(Oct 17 2019 at 14:51)</a>:</h4>
<p><span class="user-mention" data-user-id="124288">@oli</span> that won't do a delay_span_bug though, right?</p>



<a name="178388577"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388577" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388577">(Oct 17 2019 at 14:51)</a>:</h4>
<blockquote>
<p>any opinions or objections to suggesting that approach (solely for test authoring) ?</p>
</blockquote>
<p>I have no objection to that</p>



<a name="178388580"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388580" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388580">(Oct 17 2019 at 14:51)</a>:</h4>
<p>ah no</p>



<a name="178388582"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388582" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388582">(Oct 17 2019 at 14:51)</a>:</h4>
<p>we kind of need delay_span_bug here, I think, if I understand correctly</p>



<a name="178388600"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388600" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388600">(Oct 17 2019 at 14:51)</a>:</h4>
<p>right</p>



<a name="178388613"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388613" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388613">(Oct 17 2019 at 14:51)</a>:</h4>
<p>actually let me put up the tally.:)</p>



<a name="178388619"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388619" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388619">(Oct 17 2019 at 14:51)</a>:</h4>
<p><code>-Ztreat-err-as-bug</code> ignores <code>delay_span_bug</code> making it into a true error?</p>



<a name="178388620"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388620" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388620">(Oct 17 2019 at 14:51)</a>:</h4>
<p><code>-Ztreat-warn-as-delay-span-bug</code></p>



<a name="178388621"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388621" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388621">(Oct 17 2019 at 14:51)</a>:</h4>
<p>any opinions or objections to suggesting that approach (solely for test authoring) ?</p>



<a name="178388713"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388713" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388713">(Oct 17 2019 at 14:52)</a>:</h4>
<blockquote>
<p><code>-Ztreat-warn-as-delay-span-bug</code></p>
</blockquote>
<p>heh heh heh</p>



<a name="178388745"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388745" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388745">(Oct 17 2019 at 14:53)</a>:</h4>
<blockquote>
<p><code>-Ztreat-err-as-bug</code> ignores <code>delay_span_bug</code> making it into a true error?</p>
</blockquote>
<p>oh good point, I'd have to go review <em>what</em> happens in that scenario</p>



<a name="178388756"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388756" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388756">(Oct 17 2019 at 14:53)</a>:</h4>
<p>okay well I'll take point on this then</p>



<a name="178388793"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388793" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388793">(Oct 17 2019 at 14:53)</a>:</h4>
<blockquote>
<p><code>-Ztreat-err-as-bug</code> ignores <code>delay_span_bug</code> making it into a true error?</p>
</blockquote>
<p>(please don't alter <em>this</em> behavior, it's quite useful)</p>



<a name="178388843"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388843" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388843">(Oct 17 2019 at 14:54)</a>:</h4>
<p>nom: "rust-lld since 1.38 overlaps .text with .rodata for embedded arm target" <a href="https://github.com/rust-lang/rust/issues/65391" target="_blank" title="https://github.com/rust-lang/rust/issues/65391">#65391</a></p>



<a name="178388906"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388906" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388906">(Oct 17 2019 at 14:55)</a>:</h4>
<p>I still haven’t seen anything that would suggest there are no issues with the person’s linker script or some such.</p>



<a name="178388920"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388920" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388920">(Oct 17 2019 at 14:55)</a>:</h4>
<p>I nominated this because I wanted to know if there was a subteam we could push this off onto</p>



<a name="178388943"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388943" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388943">(Oct 17 2019 at 14:55)</a>:</h4>
<p>don't we have an embedded WG?</p>



<a name="178388995"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178388995" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178388995">(Oct 17 2019 at 14:56)</a>:</h4>
<p>heh, we do, we could ping 'em</p>



<a name="178389001"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389001" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mati865 <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389001">(Oct 17 2019 at 14:56)</a>:</h4>
<blockquote>
<p>nom: "rust-lld since 1.38 overlaps .text with .rodata for embedded arm target" <a href="https://github.com/rust-lang/rust/issues/65391" target="_blank" title="https://github.com/rust-lang/rust/issues/65391">#65391</a></p>
</blockquote>
<p>Isn't that related to LLVM 9 upgrade?</p>



<a name="178389012"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389012" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389012">(Oct 17 2019 at 14:56)</a>:</h4>
<p>Yes.</p>



<a name="178389021"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389021" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389021">(Oct 17 2019 at 14:56)</a>:</h4>
<p><a href="https://github.com/rust-embedded/wg/" target="_blank" title="https://github.com/rust-embedded/wg/">https://github.com/rust-embedded/wg/</a></p>



<a name="178389075"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389075" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389075">(Oct 17 2019 at 14:57)</a>:</h4>
<p>is that same as github's rust-lang/wg-embedded-resources?</p>



<a name="178389094"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389094" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389094">(Oct 17 2019 at 14:57)</a>:</h4>
<p>oh no</p>



<a name="178389099"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389099" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389099">(Oct 17 2019 at 14:57)</a>:</h4>
<p>very low on time</p>



<a name="178389100"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389100" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389100">(Oct 17 2019 at 14:57)</a>:</h4>
<p>sorry</p>



<a name="178389107"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389107" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389107">(Oct 17 2019 at 14:57)</a>:</h4>
<p>um</p>



<a name="178389111"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389111" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389111">(Oct 17 2019 at 14:57)</a>:</h4>
<p>I pinged embedded folks</p>



<a name="178389117"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389117" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389117">(Oct 17 2019 at 14:57)</a>:</h4>
<p>(the leads)</p>



<a name="178389120"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389120" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389120">(Oct 17 2019 at 14:57)</a>:</h4>
<p>well we were basically done with triage tstuff</p>



<a name="178389125"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389125" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389125">(Oct 17 2019 at 14:57)</a>:</h4>
<p>so WG checkings</p>



<a name="178389131"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389131" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389131">(Oct 17 2019 at 14:58)</a>:</h4>
<h1>WG-mir-opt</h1>
<ul>
<li>promoteds aren't part of of <code>mir::Body</code> anymore (<a href="https://github.com/rust-lang/rust/pull/64419" target="_blank" title="https://github.com/rust-lang/rust/pull/64419">https://github.com/rust-lang/rust/pull/64419</a>)</li>
<li>const prop is just a special case of const eval now (<a href="https://github.com/rust-lang/rust/pull/64419" target="_blank" title="https://github.com/rust-lang/rust/pull/64419">https://github.com/rust-lang/rust/pull/64419</a>)</li>
<li><code>mir::Place</code> is not a recursive datastructure anymore (<a href="https://github.com/rust-lang/rust/pull/63420" target="_blank" title="https://github.com/rust-lang/rust/pull/63420">https://github.com/rust-lang/rust/pull/63420</a>)</li>
<li>ongoing work in both const prop and place refactorings</li>
<li>figured out a plan for "weird" place projections like dereferences (virtual locals)</li>
</ul>



<a name="178389206"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389206" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389206">(Oct 17 2019 at 14:58)</a>:</h4>
<p>thanks <span class="user-mention" data-user-id="124288">@oli</span></p>



<a name="178389220"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389220" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389220">(Oct 17 2019 at 14:58)</a>:</h4>
<p><span class="user-mention" data-user-id="116266">@Santiago Pastorino</span> you said you could speak for WG-mega ?</p>



<a name="178389228"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389228" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389228">(Oct 17 2019 at 14:58)</a>:</h4>
<p>um I mean WG-meta</p>



<a name="178389252"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389252" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389252">(Oct 17 2019 at 14:59)</a>:</h4>
<p>WG-mega sounds great btw ;)</p>



<a name="178389266"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389266" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389266">(Oct 17 2019 at 14:59)</a>:</h4>
<h1>Wg-meta</h1>
<h2>Inside Rust blog</h2>
<p>As <a href="https://blog.rust-lang.org/inside-rust/2019/09/25/Welcome.html" target="_blank" title="https://blog.rust-lang.org/inside-rust/2019/09/25/Welcome.html">you've probably seen</a> we now have an <a href="https://blog.rust-lang.org/inside-rust/index.html" target="_blank" title="https://blog.rust-lang.org/inside-rust/index.html">Inside Rust blog</a>.<br>
As the announcement says it's a great place for people to follow what's going on with Rust, so if you have any idea that may be worth blogging about please do so :). We can write about project updates, design discussions, technical aspects or any other thing you consider appropriate.</p>
<h2>ICE breaker group &amp; LLVM ICE breaker group</h2>
<p>As you are probably aware we were helping to form a set of ICE breakers groups :). More info on what ICE-Breaker group is about <a href="https://rust-lang.github.io/rustc-guide/ice-breaker/about.html" target="_blank" title="https://rust-lang.github.io/rustc-guide/ice-breaker/about.html">here</a>. Basically they aim to be an easy to join and low commitment group that can work on isolated and middle priority issues.</p>
<p>In particular we formed the LLVM ICE breaker group, more info <a href="https://rust-lang.github.io/rustc-guide/ice-breaker/llvm.html" target="_blank" title="https://rust-lang.github.io/rustc-guide/ice-breaker/llvm.html">here</a>. With the goal of determining if a bug is a result of us generating invalid LLVM IR or LLVM misoptimizing.</p>



<a name="178389286"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389286" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389286">(Oct 17 2019 at 14:59)</a>:</h4>
<p><span class="user-mention" data-user-id="116009">@nikomatsakis</span> if you want to amend something, do it live :)</p>



<a name="178389300"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389300" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389300">(Oct 17 2019 at 14:59)</a>:</h4>
<p>are there thoughts on what the next ICE breaker group(s) may be?</p>



<a name="178389303"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389303" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389303">(Oct 17 2019 at 14:59)</a>:</h4>
<p>nope, that sounds about right</p>



<a name="178389309"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389309" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389309">(Oct 17 2019 at 14:59)</a>:</h4>
<p>or are you waiting to see how this one goes first?</p>



<a name="178389312"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389312" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389312">(Oct 17 2019 at 14:59)</a>:</h4>
<p>I was going to ask for suggestions on that</p>



<a name="178389382"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389382" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389382">(Oct 17 2019 at 15:00)</a>:</h4>
<p>the other thing is that I'm trying to move to <a href="http://forge.rust-lang.org" target="_blank" title="http://forge.rust-lang.org">forge.rust-lang.org</a> as the consolidated place for documenting procedural things</p>



<a name="178389411"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389411" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389411">(Oct 17 2019 at 15:00)</a>:</h4>
<p>so some of the "policy docs" from the compiler-team repo might move there...</p>



<a name="178389420"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389420" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389420">(Oct 17 2019 at 15:00)</a>:</h4>
<p>I think it could be nice to see how one group work and improve it but unsure what <span class="user-mention" data-user-id="116009">@nikomatsakis</span> was thinking :)</p>



<a name="178389437"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389437" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389437">(Oct 17 2019 at 15:00)</a>:</h4>
<p>before we do run out of time</p>



<a name="178389446"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389446" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389446">(Oct 17 2019 at 15:00)</a>:</h4>
<p>there was one last nominated issue</p>



<a name="178389452"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389452" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389452">(Oct 17 2019 at 15:00)</a>:</h4>
<p>that we <em>should</em> discuss</p>



<a name="178389467"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389467" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389467">(Oct 17 2019 at 15:00)</a>:</h4>
<p>nom: "linking of libtest failed" <a href="https://github.com/rust-lang/rust/issues/64872" target="_blank" title="https://github.com/rust-lang/rust/issues/64872">#64872</a></p>



<a name="178389481"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389481" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389481">(Oct 17 2019 at 15:00)</a>:</h4>
<p>specifically</p>



<a name="178389502"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389502" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389502">(Oct 17 2019 at 15:01)</a>:</h4>
<p>this is suspected to be a regression due to PR <a href="https://github.com/rust-lang/rust/issues/64324" target="_blank" title="https://github.com/rust-lang/rust/issues/64324">#64324</a> (which fixed <a href="https://github.com/rust-lang/rust/issues/64319" target="_blank" title="https://github.com/rust-lang/rust/issues/64319">#64319</a>)</p>



<a name="178389525"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389525" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389525">(Oct 17 2019 at 15:01)</a>:</h4>
<p>(note well: I have <strong>not</strong> verified that suspicion)</p>



<a name="178389547"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389547" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389547">(Oct 17 2019 at 15:01)</a>:</h4>
<p>my question is this: in terms of evaluating relative risk</p>



<a name="178389560"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389560" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389560">(Oct 17 2019 at 15:01)</a>:</h4>
<p>are we better off immediately reverting PR <a href="https://github.com/rust-lang/rust/issues/64324" target="_blank" title="https://github.com/rust-lang/rust/issues/64324">#64324</a> (and thus reintroducing <a href="https://github.com/rust-lang/rust/issues/64319" target="_blank" title="https://github.com/rust-lang/rust/issues/64319">#64319</a>)</p>



<a name="178389629"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389629" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389629">(Oct 17 2019 at 15:02)</a>:</h4>
<p>or just letting <a href="https://github.com/rust-lang/rust/issues/64872" target="_blank" title="https://github.com/rust-lang/rust/issues/64872">#64872</a> stand (and hope it gets resolved in some reasonable manner, eventually, without reverting <a href="https://github.com/rust-lang/rust/issues/64324" target="_blank" title="https://github.com/rust-lang/rust/issues/64324">#64324</a>)</p>



<a name="178389651"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389651" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389651">(Oct 17 2019 at 15:02)</a>:</h4>
<p>my inclination, given that <del>#64324</del> <a href="https://github.com/rust-lang/rust/issues/64319" target="_blank" title="https://github.com/rust-lang/rust/issues/64319">#64319</a> arises when you <em>mix optimization levels</em> amongst crates</p>



<a name="178389661"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389661" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389661">(Oct 17 2019 at 15:02)</a>:</h4>
<p>while <a href="https://github.com/rust-lang/rust/issues/64872" target="_blank" title="https://github.com/rust-lang/rust/issues/64872">#64872</a> arises <strong>without</strong> such mixing</p>



<a name="178389673"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389673" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389673">(Oct 17 2019 at 15:02)</a>:</h4>
<p>is that I think we should probably consider reverting PR <a href="https://github.com/rust-lang/rust/issues/64324" target="_blank" title="https://github.com/rust-lang/rust/issues/64324">#64324</a></p>



<a name="178389734"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389734" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389734">(Oct 17 2019 at 15:03)</a>:</h4>
<p>Any thoughts?</p>



<a name="178389825"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389825" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389825">(Oct 17 2019 at 15:04)</a>:</h4>
<p>(see also <span class="user-mention" data-user-id="124287">@mw</span> 's semi-recent "vision for Rust 2020: Kill dylib")</p>



<a name="178389851"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389851" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389851">(Oct 17 2019 at 15:04)</a>:</h4>
<p>hmm</p>



<a name="178389854"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389854" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389854">(Oct 17 2019 at 15:04)</a>:</h4>
<p>My first thought is that it would be a shame to reduce progress on "Project Kill dylib"</p>



<a name="178389859"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389859" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389859">(Oct 17 2019 at 15:04)</a>:</h4>
<p>do we have any idea who will do that follow-up work?</p>



<a name="178389868"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389868" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389868">(Oct 17 2019 at 15:04)</a>:</h4>
<p>+ the PR had perf improvements we'd be reverting</p>



<a name="178389916"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389916" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389916">(Oct 17 2019 at 15:05)</a>:</h4>
<blockquote>
<p>do we have any idea who will do that follow-up work?</p>
</blockquote>
<p>the work of dealing with fallout after the hypothesized revert, you mean?</p>



<a name="178389922"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389922" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Vadim Petrochenkov <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389922">(Oct 17 2019 at 15:05)</a>:</h4>
<blockquote>
<p>@mw 's semi-recent "vision for Rust 2020: Kill dylib"</p>
</blockquote>
<p>Source?</p>



<a name="178389929"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389929" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389929">(Oct 17 2019 at 15:05)</a>:</h4>
<p>or the work of trying to investigate <a href="https://github.com/rust-lang/rust/issues/64872" target="_blank" title="https://github.com/rust-lang/rust/issues/64872">#64872</a> if we do not revert?</p>



<a name="178389951"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389951" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389951">(Oct 17 2019 at 15:05)</a>:</h4>
<p><span class="user-mention" data-user-id="123856">@Vadim Petrochenkov</span> previous meeting or the one before that I think</p>



<a name="178389953"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178389953" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178389953">(Oct 17 2019 at 15:06)</a>:</h4>
<blockquote>
<blockquote>
<p>@mw 's semi-recent "vision for Rust 2020: Kill dylib"</p>
</blockquote>
<p>Source?</p>
</blockquote>
<p>I'll see if I can find it. I think it was during a recent design meeting.</p>



<a name="178390017"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390017" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390017">(Oct 17 2019 at 15:06)</a>:</h4>
<p>(it would also be a shame to not make progress on cranelift)</p>



<a name="178390053"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390053" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390053">(Oct 17 2019 at 15:06)</a>:</h4>
<blockquote>
<blockquote>
<p>@mw 's semi-recent "vision for Rust 2020: Kill dylib"</p>
</blockquote>
<p>Source?</p>
</blockquote>
<p>found it: <a href="https://zulip-archive.rust-lang.org/131828tcompiler/10812designmeeting20190927.html#176752386" target="_blank" title="https://zulip-archive.rust-lang.org/131828tcompiler/10812designmeeting20190927.html#176752386">https://zulip-archive.rust-lang.org/131828tcompiler/10812designmeeting20190927.html#176752386</a></p>



<a name="178390083"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390083" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Vadim Petrochenkov <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390083">(Oct 17 2019 at 15:07)</a>:</h4>
<p>Thanks!</p>



<a name="178390089"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390089" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390089">(Oct 17 2019 at 15:07)</a>:</h4>
<blockquote>
<p>Any thoughts?</p>
</blockquote>
<p>I thnk your logic makes sense, <span class="user-mention" data-user-id="116083">@pnkfelix</span>; I'm mildly worried we'll revert but neither <span class="user-mention" data-user-id="116015">@Alex Crichton</span> nor <span class="user-mention" data-user-id="124287">@mw</span> have time to follow up -- although that applies equally if we don't revert</p>



<a name="178390121"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390121" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390121">(Oct 17 2019 at 15:07)</a>:</h4>
<p>how much time do we have before the decision <em>really</em> needs to be made?</p>



<a name="178390135"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390135" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390135">(Oct 17 2019 at 15:07)</a>:</h4>
<p>/me goes to find rust forge's release schedule</p>



<a name="178390159"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390159" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390159">(Oct 17 2019 at 15:07)</a>:</h4>
<p>I also don't quite understand the conditions in which <a href="https://github.com/rust-lang/rust/issues/64872" target="_blank" title="https://github.com/rust-lang/rust/issues/64872">#64872</a> triggers</p>



<a name="178390168"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390168" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390168">(Oct 17 2019 at 15:07)</a>:</h4>
<p>we've got some time</p>



<a name="178390182"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390182" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390182">(Oct 17 2019 at 15:08)</a>:</h4>
<p>yeah I am still narrowing <a href="https://github.com/rust-lang/rust/issues/64872" target="_blank" title="https://github.com/rust-lang/rust/issues/64872">#64872</a> down</p>



<a name="178390220"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390220" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390220">(Oct 17 2019 at 15:08)</a>:</h4>
<p>just started that today</p>



<a name="178390240"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390240" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390240">(Oct 17 2019 at 15:08)</a>:</h4>
<p>so maybe I can spend this week looking at that</p>



<a name="178390251"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390251" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390251">(Oct 17 2019 at 15:08)</a>:</h4>
<p>and we can revisit this question at next weeks' triage meeting?</p>



<a name="178390290"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390290" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390290">(Oct 17 2019 at 15:09)</a>:</h4>
<p>Sound good?</p>



<a name="178390316"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390316" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390316">(Oct 17 2019 at 15:09)</a>:</h4>
<p>seems good</p>



<a name="178390320"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390320" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390320">(Oct 17 2019 at 15:09)</a>:</h4>
<p>In any case, I've kept everyone here over time</p>



<a name="178390324"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390324" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390324">(Oct 17 2019 at 15:09)</a>:</h4>
<p>thanks to everyone in <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span> for coming!</p>



<a name="178390382"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390382" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Vadim Petrochenkov <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390382">(Oct 17 2019 at 15:10)</a>:</h4>
<p>One more announcement: I'll be minimally available in the next 3 months at least due to starting a new job next week.<br>
I already changed jobs twice while working on Rust and it never stopped me entirely, but every time it brings some uncertainty.<br>
I still hope to do reviews, and hope to finish the crate loader refactorings that are supposed to close known issues in that area (<a href="https://github.com/rust-lang/rust/issues/64450" target="_blank" title="https://github.com/rust-lang/rust/issues/64450">#64450</a>, <a href="https://github.com/rust-lang/rust/issues/56935" target="_blank" title="https://github.com/rust-lang/rust/issues/56935">#56935</a>, <a href="https://github.com/rust-lang/rust/issues/55103" target="_blank" title="https://github.com/rust-lang/rust/issues/55103">#55103</a>, <a href="https://github.com/rust-lang/rust/issues/56590" target="_blank" title="https://github.com/rust-lang/rust/issues/56590">#56590</a>).</p>



<a name="178390625"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390625" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390625">(Oct 17 2019 at 15:12)</a>:</h4>
<p>I hope the new job works out great <span class="user-mention" data-user-id="123856">@Vadim Petrochenkov</span>! Congratulations. :)</p>



<a name="178390682"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390682" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mati865 <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390682">(Oct 17 2019 at 15:13)</a>:</h4>
<blockquote>
<p><span aria-label="construction worker" class="emoji emoji-1f477" role="img" title="construction worker">:construction_worker:</span> If you are a Windows GNU developer (aka mingw, I think), we could use help looking into this bug: " couldn't load codegen backend on windows-gnu" <a href="https://github.com/rust-lang/rust/issues/61561" target="_blank" title="https://github.com/rust-lang/rust/issues/61561">#61561</a></p>
</blockquote>
<p>Didn't want to disrupt meeting but I can run builds if somebody has an idea about it.</p>



<a name="178390774"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202019-10-17%20%2354818/near/178390774" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202019-10-17.20.2354818.html#178390774">(Oct 17 2019 at 15:14)</a>:</h4>
<p><span class="user-mention" data-user-id="123856">@Vadim Petrochenkov</span> Congratz! -- (I'll try to send only the most important libsyntax PRs for you to review ^^)</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
</html>